Originally Posted by Vic311
Ok so if I use 91 everyday but decide to use 100 occassionaly. Will the DME with your tunes be able to take advantage of it? Or does this require a specific race fuel tune?
It depends on the conditions. Depends if the car is achieving its targets on 91 or if it's pulling back ignition.
Some customers request a higher octane tune for when race gas is used.